Improvement in seouring-cases for smut-mills



UNITED STATES PATENT OFFICE.

ANDREW J VANDEGRIFT, GOVINGTON, KENTUCKY.

IMPROVEMENT IN' SCOURlNG-CASES FOR SMUT-MILLS, ac-

Specification forming part of Letters Patent No. 172,062,v dated January11, 1876; application filed Ju'ne:21,l875.* a y (Men 0.

To all whom it may concern:

Be it known that I, ANDREW J. VANDE- GRIFT, of Oovington, Kenton county,State of Kentucky, have invented a certain new and useful Improvement inthe Construction of Metallic Fabric for Scouring and PercolatingPurposes, of which the following is a specification My invention is animprovement upon the metallic fabric for which application for LettersPatent was filed by me February 7, 1872 and consists in the employmentof folded sheet-metal slips, so arranged that they present their edgesto the work directly; or, in other words, are so arranged that the lineof their length is at right angles to the direction of the scouringaction, and the edges face the work, for the purpose of enabling thescale of the iron to form a continuous cuttingedge.

My invention further consists in the provision of grooved rings forconnecting the sheet-metal slips together; the object being to obtain acircular configuration for the scouring-face, which has an uninterruptedpercolating-surface throughout the entire circle.

The fabric, as a whole, is designed for scourin g-eases ofsmut-mills,and for purposes of like character.

Figure 1 is a vertical section of the scouring-case of a smut-millembodying my invention. Fig. 2 is a horizontal section of the same. Fig.3 is a perspective view of one of the slips; andFig. 4afolded plate,from which the slips are cut.

A are the sheet-metal slips. They are cut from a sheet or strip of metalwhich has previously been folded over at the sides in the manner shownin Fig. 3. B are rings of metal, formed with grooves b for the receptionof the ends of the slips A, which are located in the rings in themannershown in Fig. 2-11ot radially but tangentiallyso that thepercolating-interstices (which are formed between the slips by reason ofthe folded ends of the slips saving to separate one slip from another)are in a line calculated to carry off the scourings of the case in thedirection in which they would naturally be thrown 05 by centrifof thescouring venient appliances and the slips A are placed successively intothe grooves b, it being necessary,in order to permit them to pass theflanges b of the grooves, to enter them in a diagonal position, orprovide a notch in each flange b of the rings. The parts are solderedtogetherthat is, the slips A to rings Bby solder or otherwise, at thejunction of the slips with the rings.

It will be seen that when the case is completed, that owing to theprovision. of the grooved rings to secure the slips, the scouringfacehas acircular configuration in horizontal section, and that the scouringis in a'direction across the edges of the slips, and not paralleltherewith, as in the scouring-case shown in my application filedFebruary 7, 1872.

The advantage of having the edges of the slips across the path of thegrain is, that the scale of the iron is made to act as a cuttingedge,and, owing to its wearing less fast than the body of the iron, acontinuous cutting-e'dg is preserved until the case is entirelyworn awayFurthermore, the scouring being across the cutting-edges of the slips,and not in line therewith, is more rapidly efi'ected than is possible inthe form of case shown in my application of February 7, 1872, aforesaid.

In the operation of the case shown in Fig. 1 as the scouring-case of asmutmill, the beater rotates within it in the ordinary way, the 1'0-tation being in the direction of the arrow in Fig. 2. The grain israpidlyswept around by the beater between it and the case, and, in thisoperation, is scoured perfectly by the sharp edges of the slips A, thescourings being drawn through the tangential interstices by thecustomary air-current in such machines.

It desirable, the beater itself may consist of a cylinder or drum, whoseperiphery is formed by a similar fabric to that composing the case, soas to scour the grain by the outer surface of the rotating heater andinner surface of the case or cylinder at the same time.

For scouring-cases of smut-mills I prefer, as

herein set forth, that the interstices shall be arranged tangentially;and, for this purpose, I make the grooves bin the rings narrower thanthe slips A, compelling the slip to occupy a diagonal position, as shownin Fig. 2 but they may, of course, perform useful service when arrangedradially, or in any other possible way. The fabric may, moreover, bemade with a plain flat surface, forsome uses, by the use of grooved barsor other fastening devices in place of the grooved rings B b. c Iclaim-- I. A scouring and percolating metallic .fabric composed offolded sheet-metal strips or slips connected in such a way as to leaveinterstices between the slips, the edges of the said slips of metalbeing arranged crosswise of the direction of the grain or other materialin the operation of scouring, as and for the purpose specified.

2. The combination of folded sheet-metal slips A and grooved rings B b,as and for the purpose described.

In testimony of which invention I hereunto set my hand. v

A. J. VANDEGRIFT.

, Witnesses:

FRANK MILLWARD, J. L. WARTMANN.

